What a fabulous find! It looks like it is made from printed feedsacks.
("The Dresden Plate quilt pattern was one of the most popular quilts made during the 1920s and 30s. It was first published in the 20s but not always under the name Dresden Plate. Grandmother's Sunburst, Friendship Ring, Aster, Dahlia and Sunflower are all names I've seen for this pattern." Excerpt from Dresden Plate History.)